/Engine/Source/Runtime/Engine/Public/ParticleEmitterInstances.h
bool AddParticleHelper ( int32 InTrailIdx, int32 StartParticleIndex, [FTrailsBaseTypeDataPayload](API\Runtime\Engine\FTrailsBaseTypeDataPayload) * StartTrailData, int32 ParticleIndex, [FTrailsBaseTypeDataPayload](API\Runtime\Engine\FTrailsBaseTypeDataPayload) * TrailData, [UParticleSystemComponent](API\Runtime\Engine\Particles\UParticleSystemComponent) * InPsysComp )